Answer:
u * v = 39 ⇒ 2nd answer
Step-by-step explanation:
* Lets explain how to solve the problem
- u and v are two vectors
- u * v means the scalar product of the two vectors
- The scalar product is a way of multiplying vectors
- The result of a scalar product is always a number not a vector
- Ex: If u = ai + bj ⇒ <a , b> and v = ci + dj ⇒ <c , d> then the scalar
product of them is ac + bd where ac + bd is a number
* Lets solve the problem
∵ Vector u = 13j ⇒ <0 , 13>
∵ Vector v = i + 3j ⇒ <1 , 3>
- Lets find the scalar product
∴ u * v = (0)(1) + (13)(3)
∴ u * v = 0 + 39
∴ u * v = 39
Answer:
No
Step-by-step explanation:
Substitute x = 2 into the equation and if both sides are equal then x = 2 is a solution.
left side = (7 × 2) - 5 = 14 - 5 = 9
right side = (2 × 2) + 8 = 4 + 8 = 12
left side ≠ right side
Hence x = 2 is not a solution of the equation
Answer:
x² + 1 = 0
a = 1
b = 0
c = 1
There is no real solution because the discriminant is negative
Note.
Formula diskriminan
√b² - 4ac.
if the diskrimanan is negatif, so the quadratic equatoin dont have solution
Answer:
The Proof is given below.
Step-by-step explanation:
Given:
bisect ∠ EHG.i.e
∴ ∠EHF ≅ ∠ GHF
To Prove:
Proof:
In Δ EHF and Δ GHF
EH ≅ GH ………............{Given}
∠ EHF ≅ ∠ GHF …………..{EF bisect ∠ EHG as given above}
HF ≅ HF ………............{Reflexive Property}
Δ EHF ≅ Δ GHF …................{ By Side-Angle-Side test}
∴ EF ≅ GF........{corresponding parts of congruent triangles (c.p.c.t).}
....... PROVED
Answer:
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Step-by-step explanation:
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