The first two terms of an AP are -5and 4. The 21st term of the A.P. will be :
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Answer:176
Step-by-step explanation:
Common difference (d) = 2nd term-1st term
d= 4-(-5)=4+5=9
21st term of the AP = 1st term + 20d
a21= -4 + 20 × 9
= -4 + 180
= 176
From poojitha
10th class
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