yasmeen saves Rs32 during the first month and Rs40 in the second month . If she continues in this manner in how many month will she save Rs 2000
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so the AP is 32,40,48
cd is 8
S = n/2 ( 2a + (n-1) d )
2000 × 2 = n ( 2×32 + (n-1) 8)
4000 = n ( 64 + 8n - 8 )
4000 = 64n + 8n^2 - 8n
8n^2 + 56n - 4000 = 0
n^2 + 7n - 500 = 0
could you please solve the quadratic yourselves.....it would give you the required practice
hope this helps
cd is 8
S = n/2 ( 2a + (n-1) d )
2000 × 2 = n ( 2×32 + (n-1) 8)
4000 = n ( 64 + 8n - 8 )
4000 = 64n + 8n^2 - 8n
8n^2 + 56n - 4000 = 0
n^2 + 7n - 500 = 0
could you please solve the quadratic yourselves.....it would give you the required practice
hope this helps
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