Question

th
A
)
10
tem
100
7th
and 13th
taims
Sum​

Answer 1

Answer:

Plasmolysis is the process in which cells lose water in a hypertonic solution. The reverse process, deplasmolysis or cytolysis, can occur if the cell is in a hypotonic solution resulting in a lower external osmotic pressure and a net flow of water into the cell.

Answer 2

Answer:

200

Step-by-step explanation:

Let the first term of the AS = a

" " common difference of the AS = d

Now, we know that, a_{n}a

n

= a + ( n-1)d

so, a_{10}a

10

= a + 9d

or a + 9d = 100....................(i)

a_7a

7

= a + 6d

and a_{13}a

13

= a + 12d

So, a_7a

7

+ a_{13}a

13

= a + 6d + a + 12d= 2a + 18d

or a_7a

7

+ a_{13}a

13

= 2 (a +9d)

or a_7a

7

+ a_{13}a

13

= 2 × 100 (using (i) )

∴ a_7a

7

+ a_{13}a

13

= 200

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