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Ksju [112]
3 years ago
15

If the common difference of an ap is 3/2 and its 20 th term 35×1/2 find first term and 15 th term

Mathematics
1 answer:
Lady bird [3.3K]3 years ago
4 0

Answer:

Step-by-step explanation:

d = 3/2

a₂₀ = a₁+19d

35/2 = a₁ + 19×3/2

a₁ = 35/2 - 19×3/2 = -11

a₁₅ = a₁+14d = -11 + 14×3/2 = 10

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48 + 54 = ___ ´ (8 + 9)

Theleft-hand side of the equation is:
                                                             48 + 54 = 102
Now the right-hand side of the equation:
                                                                    A </span>× (8+9) = Right-hand side
                                                                    A × (8+9) = 102
Solving for the unknown variable A,
                                                                    A × 17 = 102
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                                                         A × 1 = 6
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