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3 years ago

13

Everyone FREEE POINTSSSSSSSSS

2 answers:

Snowcat [4.5K]3 years ago

7 0

Answer:

TYSM

Step-by-step explanation:

<33333

Helga [31]3 years ago

4 0

echoes dont take the post down

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3 years ago

A cube has a volume of 1,000 cubic feet. What is the length of am edge of the cube? Show how you found your answer.

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3 years ago

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balandron [24]

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8 0

3 years ago

Kisi samantar shreni me pratham 6 pado ka yog 42 hai iske 10 we pad tatha 30 we pad me anupat 1:3 ka hai is samtar shereni ka pr

Semmy [17]

Answer:

समांतर श्रेणी का प्रथम पद a = 2

$t_{13}= 26$

Step-by-step explanation:

माना समांतर श्रेणी का प्रथम पद a और सामन्य अन्तर d है.

इसलिए..

$S_6 = 42....(given)$

$\therefore \frac{6}{2}\{2a + (6-1)d\}= 42$

$\therefore 3\{2a + 5d\}= 42$

$\therefore \{2a + 5d\}= \frac{42}{3}$

$\therefore 2a + 5d=14...... (1)$

$t_{10} : t_{30}= 1 : 3.....(given)$

$\therefore \frac{t_{10}}{t_{30}} = \frac{1}{3}$

$\therefore \frac{a +9d}{a+29d} = \frac{1}{3}$

$3(a + 9d) = a + 29d$

$3a + 27d = a + 29d$

$3a - a = 29d - 27d$

$2a= 2d$

$a= d...... (2)$

समीकरण (1) और (2) से:

$\therefore 2a + 5a=14$

$\therefore 7a=14$

$\therefore a=\frac{14}{7}$

$\therefore a=2$

समांतर श्रेणी का प्रथम पद a = 2

a = d = 2... (समीकरण 2 से)

$t_{13}= 2 + (13-1)2$

$t_{13}= 2 + 12\times 2$

$t_{13}= 2 + 24$

$t_{13}= 26$

5 0

3 years ago