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  • The 21st term of the AP whose first two terms are -3 and 4 is

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

Answers (1)

Given: First two terms are –3 and 4,

a = −3

a + d = 4

d = 4 − a

d = 4 + 3

Common differnce (d) = 7

Now

a21 = a + (21 - 1)d

a21 = -3 + (20)7

a21 = 137

Posted by

Ravindra Pindel

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