which term of the Ap3,15,27,39......willbe120more than its 21st term
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Answered by
2
Heya !!!!
---------- Here is your answer -----------------
According to your question...
a + (n-1ld = a + (21-1)d + 120
a+ (n-1)d = 20d +120
(n-1)d = 20d +120
(n-1)12 = 20*12 +120
12n -12 = 240+120
12n = 372
n = 31
---------- Here is your answer -----------------
According to your question...
a + (n-1ld = a + (21-1)d + 120
a+ (n-1)d = 20d +120
(n-1)d = 20d +120
(n-1)12 = 20*12 +120
12n -12 = 240+120
12n = 372
n = 31
Answered by
1
I hope it will help you
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