Question

The 21st term of an AP whose first two terms are -3 and 4

Answer 1

I guess 137 is the answer for this question.

Answer 2

Answer:

137

Step-by-step explanation:

Given, first two terms of an AP are

a = -3 and a + d = 4

=> -3 + d = 4

Common Difference, d = 7

.°. a21 = a + (21 + 1)d ⠀[°.° an = a + (n - 1)d]

⠀⠀⠀⠀⠀= -3 + (20)7

⠀⠀⠀⠀⠀= -3 + 140 = 137