Question

in a G.P 1/4 , -1/2 ,1 ,- 2 find 10th term​

Answer 1

Answer:

$a = \frac{1}{4} \\ d = \frac{ - 1}{2} - \frac{1}{4} = \frac{ - 2 - 1}{4} = \frac{ - 3}{4} \\ 5th \: term = a + 9d \\ = \frac{1}{4} + 4( \frac{ - 3}{4} ) \\ = \frac{1}{4} - 3 = \frac{1 - 12}{4} = \frac{ - 11}{4} \\ hope \: this \: helps \: u...$

Answer 2

Step-by-step explanation:

nth term of GP = a*r^(n-1)

where r is common ratio

a is first term

to find 10 th term

n=10

a=1/4

r= -2

10th term = 1/4 * -2^(9)

= -128